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