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