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