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