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