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