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