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