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