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