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