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