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