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