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