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