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