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)(17,18,21,26)(19,28,31,24)(20,33,23,25)(22,27,29,38)(30,39,34,41)(32,44,45,40)(35,47,37,42)(36,48,46,43)(1,3,4,8)(2,5,6,7)(17,19,29,45,20,34,37,36,21,31,22,32,23,30,35,46)(18,24,38,44,33,39,42,43,26,28,27,40,25,41,47,48)(10,13)(14,16)(17,19,21,31)(18,24,26,28)(20,30,23,34)(22,36,29,46)(25,39,33,41)(27,43,38,48)(32,35,45,37)(40,47,44,42)(2,6)(5,7)(9,11,12,15)(10,14,13,16)(17,20,21,23)(18,25,26,33)(19,30,31,34)(22,35,29,37)(24,39,28,41)(27,42,38,47)(32,36,45,46)(40,48,44,43)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.