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