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