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