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