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