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