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