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