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