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