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