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