I'm not French and I don't follow French politics, but I can read the language.
Some of the data at those links:
Sarkozy won 58% among craftsmen, businessmen and CEOs. Compared to the last election 5 years ago he held his ground (46% vs. 46%) among "workers" (I'm guessing these are actually blue-collar workers), but lost 9% (52% to 43%) among top-level employees and people in "liberal professions" (who are those? college professors? teachers?) Sarkozy got 49% of the voters who work in the private sector, 37% of those who work in the public sector. He won 47% of permanent employees, 43% of the people employed through time-limited work contracts (temps, I guess) and 36% of the unemployed. So far nothing seems surprising to me. He WAS running against a Socialist. Sarkozy won 52% of the people who own their own homes, 40% among private-sector renters and 36% among the people living in public housing. I just learned something - French public housing must be far whiter than the US version. 36% for a "candidate of the right" - wow.
The important stuff: Sarkozy got 59% of the Catholics and Hollande got 93% of the Muslims. The article literally said that Muslims "supported the left by 93%". It's pretty funny when you think about it. What can be more right-wing than Islam?
Sarkozy got 41% of those who make less than 1,000 Euros per month, 45% of those who make between 1,000 and 2,000, more among those who make above 2,000. He got slightly more votes among those who've had 2 or more years of college than among those who've had less education than that. I'm curious about who people with post-graduate educations voted for, but that info isn't in the article.
The biggest issues for Sarko voters were debt and deficits (65%) and immigration (53%). Those who voted for Hollande were more concerned with social inequality, the level of employment and with purchasing power.
The article says that Sarkozy did well in the deindustrialized portion of France (their rust belt), which seems to be in the north-east. The article suggests that this is also the portion where the National Front usually does best.