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