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