I think Liverpool are the better team on paper, but we've got to take into consideration home advantage.
Salah, Mane and Firmino just haven't "clicked" yet like they did at the end of last season. Yes, Liverpool are winning their games, but it's not the constant amazing attacks and 3-0, 4-0 wins we were seeing at the end of last season. On the other hand, Chelsea seem to finally be favoring Giroud over Morata, and the link up between Giroud and Hazard has been fantastic in the last few games.
This game could easily go either way.