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