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