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