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