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