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