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