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