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