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