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