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