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