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