I also make new graphics for each of my podcast episodes and can do the same for you. For consistency’s sake, I generally find a “logo” I like and stick with it, just making minor changes to each episode.
People tend to recognize the show better if the logo is similar each time.
Here are some examples.
This is for my podcast Volsteadland. For this one I have a friend who makes some of the art that gets switched out each episode.
Here’s what I’ve done for The Activity Continues: