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