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