One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,7,4,6)(17,18,22,27,23,28,21,26)(19,29,32,39,31,41,36,24)(20,33,34,40,35,42,37,25)(30,38,46,48,44,47,45,43)(1,3,5,4)(2,6,8,7)(9,10)(11,14)(12,13)(15,16)(17,19)(18,24)(20,30)(21,32)(22,36)(23,31)(25,38)(26,29)(27,41)(28,39)(33,43)(34,45)(35,44)(37,46)(40,47)(42,48)(1,3,5,4)(2,7,8,6)(10,13)(14,16)(17,20,23,35)(18,25,28,40)(19,30,31,44)(21,34,22,37)(24,38,39,47)(26,33,27,42)(29,43,41,48)(32,45,36,46)(1,3,5,4)(2,7,8,6)(9,11)(10,14)(12,15)(13,16)(19,31)(24,39)(29,41)(30,44)(32,36)(38,47)(43,48)(45,46)(1,4,5,3)(2,6,8,7)(11,15)(14,16)(17,21,23,22)(18,26,28,27)(19,32,31,36)(20,34,35,37)(24,29,39,41)(25,33,40,42)(30,45,44,46)(38,43,47,48)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.