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