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