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