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