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