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