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