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