Hi webceo,
that feature is not currently available in JEvents. Nevertheless you can apply some workarounds to this situation:

1. Use Standard Images & file plugin and group the images by album with a template override of the event detail page

2. Use an Image Gallery extension and allow including a link to each gallery with our Custom Fields Plugin.

There is possibly much more ways of implementing this if you have some coding experience, these are just the 2 first options that came to my mind