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