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