One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(10,15)(11,16)(12,13)(17,18,22,25)(19,23,28,37)(20,30,33,45)(21,34,31,26)(24,38,39,32)(27,40,42,48)(29,44,41,36)(35,46,47,43)(2,5)(6,8)(9,10,13,11,14,16,12,15)(17,19)(18,23)(20,27)(21,29)(22,28)(24,35)(25,37)(26,36)(30,40)(31,41)(32,43)(33,42)(34,44)(38,46)(39,47)(45,48)(10,16)(11,15)(17,20,31,38,22,33,21,32)(18,24,34,45,25,39,26,30)(19,27,41,46,28,42,29,43)(23,35,44,48,37,47,36,40)(1,3,4,7)(2,6,5,8)(9,11,12,10,14,15,13,16)(18,25)(19,28)(24,39)(26,34)(27,42)(29,41)(30,45)(43,46)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.