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