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