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