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