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