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)(17,18,21,28,22,27,37,26)(19,29,31,41,32,23,38,42)(20,25,36,44,35,46,34,24)(30,45,48,39,33,40,47,43)(1,3,5,8)(2,6,4,7)(9,10)(11,15)(12,14)(13,16)(17,19,22,32)(18,23,27,29)(20,33,35,30)(21,31,37,38)(24,43,44,39)(25,45,46,40)(26,41,28,42)(34,48,36,47)(9,11)(10,13)(12,16)(14,15)(17,20,22,35)(18,24,27,44)(19,30,32,33)(21,34,37,36)(23,39,29,43)(25,28,46,26)(31,47,38,48)(40,42,45,41)(1,2,5,4)(3,7,8,6)(11,16)(13,15)(17,20)(18,25)(19,30)(21,36)(22,35)(23,40)(24,26)(27,46)(28,44)(29,45)(31,48)(32,33)(34,37)(38,47)(39,41)(42,43)(1,4,5,2)(3,7,8,6)(10,14)(13,15)(17,21,22,37)(18,26,27,28)(19,31,32,38)(20,34,35,36)(23,41,29,42)(24,25,44,46)(30,47,33,48)(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.