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