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