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