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