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)(11,13,15,16)(12,14)(17,18,21,25,22,26,20,24)(19,27,30,31,28,32,29,23)(2,5)(6,7)(9,11,12,15)(10,13)(14,16)(17,19)(18,23,26,31)(20,29)(21,30)(22,28)(24,32,25,27)(1,3,4,8)(2,6,5,7)(10,14)(11,15)(19,28)(23,31)(27,32)(29,30)(10,14)(13,16)(17,20,22,21)(18,24,26,25)(19,29,28,30)(23,32,31,27)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.