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