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