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)(11,13)(12,14)(15,16)(17,18)(19,20)(21,23)(22,24)(25,26,29,32)(27,31,28,30)(1,3,6,4)(2,7,8,5)(9,10,12,14)(11,13,15,16)(17,19,21,24)(18,22,23,20)(2,8)(3,4)(11,15)(13,16)(19,24)(20,22)(25,27,29,28)(26,30,32,31)(1,4,6,3)(2,7,8,5)(9,11,12,15)(10,13,14,16)(17,20)(18,19)(21,22)(23,24)(25,27,29,28)(26,30,32,31)(1,5,6,7)(2,3,8,4)(9,10)(11,13)(12,14)(15,16)(17,18)(19,20)(21,23)(22,24)(25,28,29,27)(26,31,32,30)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.