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