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