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