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