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