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