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