The score says how it ended. xG says how it should have ended: it is the sum of the chances each shot was worth, not an opinion about the game.
Lyon won against the run of chances: Toulouse created more (2.16 xG against 0.76).
Toulouse: −4.0 for the season (13 in the table). Lyon: +1.8 (2). The gap between points and xPTS is built from matches like this one.