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