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