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