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