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