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