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