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