We already covered how to get old Google image results design in any browser in Google Image Search with limitation being applied to that particular search session only where as Old Google Image search extension for Safari automatically reverts Google image search to old layout when you visit Google Image search in Safari.
Recently Google changed the way pictures show in Google image search results you can get Google image old layout in Safari with Old Google Image Search Safari extension.
You don’t need to set any option for the extension,just install this extension and whenever you visit Google image search, results being shown in old Google Image layout automatically in Safari.
Install Old Google Image Search Safari extension from Safari Extensions Gallery from Search Tools category.
Actually this extension does NOT restore the old image search. All it does is paginate the new layout.