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