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