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