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