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