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