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