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