How to display featured image based on Category?

Hi all,

I am currently using Scylla Lite theme and would like the post on the front page to display the featured image.

However, I’d also like this to be automated.

EG if I was to create a new post, then once I’ve assigned the category for that specific post.

It automatically assigns an image to that post (dependant on which category it belongs to) and post it on the front page.

Help would be much appreciated.