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