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