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