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