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