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