Hi,
"options" can only be displayed as dropdowns. There are no display options you can choose for them for now.
Having radios like you can do with characteristics would require modifying the code of the file "option" via the menu Display>Views, but the modifications won't be possible if you're not a developer.
"options" are only useful if you want the price to change based on the selected option. In your case, the price doesn't change. So it doesn't look like you should use an option anyway for what you want.
You could use a characteristic displayed in radio, or a custom radio field.
Both allow you to have image tags as values for the selection.