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