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