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