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