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