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