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