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