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