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