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