One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10,14,15,12,11,13,16)(17,18,20,24,21,23,29,28)(19,22,26,30,27,25,31,32)(2,5)(6,8)(9,11,13,15,12,10,14,16)(17,19,20,26,21,27,29,31)(18,22,24,30,23,25,28,32)(1,3,4,7)(2,6,5,8)(10,15)(11,16)(13,14)(17,18)(19,25)(20,28)(21,23)(22,27)(24,29)(26,30)(31,32)(2,5)(6,8)(18,23)(22,25)(24,28)(30,32) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.