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