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