One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,6)(5,7)(9,10)(11,16)(12,15)(13,14)(17,18,21,20)(19,25,28,23)(22,24,31,30)(26,29,32,27)(1,3,5,4)(2,6,7,8)(10,14)(15,16)(17,19,21,28)(18,23,20,25)(22,27,31,29)(24,32,30,26)(1,4,5,3)(2,6,7,8)(9,11,13,12)(10,15,14,16)(17,20,21,18)(19,26,28,32)(22,24,31,30)(23,27,25,29)(9,12,13,11)(10,15,14,16)(19,27)(22,31)(23,32)(24,30)(25,26)(28,29)(18,20)(23,25)(24,30)(26,32) 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.