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