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