One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,7,10,6,11,5,16)(3,4,13,14,12,15,9,8)(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)(1,3,5,9,6,12,7,13)(2,8,10,4,11,14,16,15)(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)(1,4,7,8,6,15,5,14)(2,9,16,3,11,13,10,12)(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.