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