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