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