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