Display post category in entry meta on homepage

I’ve just installed Sparkling theme on my self-hosted WP blog but can’t figure out how to display the post category in the entry-meta - alongside the date, author, and comment count - on the main page. It shows up on the post itself but not on the main homepage.
I’ve searched these forums and tried the solution in this thread here but it doesn’t work? Or rather, I don’t see any place where I can enable the display of post category on the main page. Then again, that’s four years old so maybe it doesn’t work now.

Does anyone have a solution to this?