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)(21,25)(22,23)(24,28)(26,27)(29,32)(30,31) involution — undirected(6,8)(9,10,14,16)(11,15,12,13)(18,23)(19,24)(25,31)(26,32)(5,6)(7,8)(9,11,14,12)(10,15,16,13)(17,19,22,24)(18,20,23,28)(21,26,30,32)(25,27,31,29)(1,2,3,4)(9,12,14,11)(10,13,16,15)(17,20)(18,24)(19,23)(21,29)(22,28)(25,26)(27,30)(31,32)(9,13)(10,11)(12,16)(14,15)(17,21)(18,25)(19,26)(20,27)(22,30)(23,31)(24,32)(28,29) involution — undirectedA 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.