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