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