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