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