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