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