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