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