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