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