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)(17,18,22,25,21,20,23,26)(19,27,30,28,29,24,31,32)(9,10,12,13)(11,14,15,16)(17,19,23,31,21,29,22,30)(18,24,26,28,20,27,25,32)(2,4)(11,15)(14,16)(17,20)(18,21)(19,28)(22,25)(23,26)(24,31)(27,30)(29,32) involution — undirected(6,8)(9,11,12,15)(10,14,13,16)(18,20)(24,27)(25,26)(28,32)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.