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