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