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