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