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