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