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