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