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