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