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