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