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