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