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