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