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