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