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