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