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