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