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