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