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