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