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