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