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