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