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