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