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