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)(20,25)(21,39)(22,42)(23,43)(24,30)(26,33)(27,32)(28,41)(29,40)(34,46)(35,45)(36,44)(37,48)(38,47)(2,5)(6,8)(17,19,32,38,23,35,41,36,24,33,22,34,40,37,21,20)(18,25,39,48,29,46,42,26,30,44,28,45,43,47,27,31)(9,11,12,16)(10,13,14,15)(19,33)(20,36)(25,44)(26,31)(34,38)(35,37)(45,48)(46,47)(1,3,4,7)(2,6,5,8)(17,20,21,37,40,34,22,33,24,36,41,35,23,38,32,19)(18,26,27,46,43,48,28,25,30,31,42,47,29,45,39,44)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.