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