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