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)(12,13)(15,16)(17,18)(19,24)(20,32)(21,36)(22,26)(23,27)(25,35)(28,42)(29,40)(30,39)(31,41)(33,38)(34,43)(37,44)(45,47)(46,48)(2,6)(7,8)(9,10)(11,14)(12,13)(15,16)(17,19,22,31)(18,24,26,41)(20,33,35,28)(21,30,23,29)(25,42,32,38)(27,40,36,39)(34,46,37,45)(43,48,44,47)(1,3,5,4)(2,7,6,8)(10,13)(14,16)(17,20,22,35)(18,25,26,32)(19,28,31,33)(21,37,23,34)(24,38,41,42)(27,44,36,43)(29,45,30,46)(39,47,40,48)(1,4,5,3)(2,8,6,7)(10,13)(14,16)(18,26)(19,29)(21,23)(24,39)(25,32)(28,45)(30,31)(33,46)(34,37)(38,47)(40,41)(42,48)(2,6)(7,8)(9,11,12,15)(10,14,13,16)(17,21,22,23)(18,27,26,36)(19,30,31,29)(20,34,35,37)(24,40,41,39)(25,43,32,44)(28,45,33,46)(38,47,42,48)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.