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