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