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)(11,14)(12,16)(13,15)(17,18,22,23)(19,24,28,32)(20,29,31,25)(21,26,27,30)(2,5)(6,8)(9,11,13,12)(10,14,15,16)(17,19,22,28)(18,24,23,32)(20,30,31,26)(21,25,27,29)(1,3,4,7)(2,6,5,8)(10,15)(14,16)(17,20)(18,25)(19,27)(21,28)(22,31)(23,29)(24,26)(30,32)(9,12,13,11)(10,16,15,14)(17,21,22,27)(18,26,23,30)(19,20,28,31)(24,29,32,25)(19,28)(20,31)(24,32)(25,29) 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.