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)(11,13)(12,16)(14,15)(17,18,23,25)(19,24,21,20)(22,30,31,26)(27,28,29,32)(1,2,4,6)(3,5,8,7)(10,15)(11,16)(17,19)(18,24)(20,25)(21,23)(22,27)(26,32)(28,30)(29,31)(1,2,4,6)(3,7,8,5)(9,11,14,16)(10,12,15,13)(18,25)(19,21)(22,31)(28,32)(1,2,4,6)(3,5,8,7)(9,12,14,13)(10,11,15,16)(17,20,23,24)(18,19,25,21)(22,28,31,32)(26,27,30,29)(1,2)(3,5)(4,6)(7,8)(9,10)(11,12)(13,16)(14,15)(17,21,23,19)(18,20,25,24)(22,29,31,27)(26,28,30,32)(1,3,4,8)(2,5,6,7)(9,13,14,12)(10,16,15,11)(17,22,23,31)(18,26,25,30)(19,27,21,29)(20,28,24,32)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.