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