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