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