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