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