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