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