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