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