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