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