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