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)(17,18,21,24,22,25,20,26)(19,23,29,31,28,32,27,30)(2,3)(9,11,12,15)(10,13,14,16)(17,19,21,29,22,28,20,27)(18,23,24,31,25,32,26,30)(10,14)(13,16)(18,24)(19,27)(20,21)(25,26)(28,29)(30,31) involution — undirected(1,3,4,2)(6,8)(18,25)(19,28)(24,26)(27,29)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.