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