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