Add thumbnails to tags
Under the list view of entries, I would suggest displaying thumbnails that represent a tag and not an uploaded image. i would let the images separated as part of the inner content of the entry.
A file upload field should be provided for the created tags.
In my personal case, I use the thumbnails as indicator, but with the current setup, it forces me to upload several times the same image if for example the tag is petrol, so every time I fill petrol, I create a new entry, but the image is unique to each entry, lots of redundancy and wasted space. I would link the thumbnails to the tags (Like colors to folders)