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