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