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