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