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