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