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