One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,5)(3,6,7,8)(9,10,13,16)(11,17,19,14)(12,20,21,15)(18,22,24,23)(25,26,29,33)(27,31,37,47)(28,39,41,32)(30,34,43,51)(35,53,54,45)(36,46,38,48)(40,56,55,49)(42,52,44,50)(9,11)(10,14)(12,18)(13,19)(15,22)(16,17)(20,23)(21,24)(25,27,29,37)(26,31,33,47)(28,40,41,55)(30,36,43,38)(32,49,39,56)(34,46,51,48)(35,44,54,42)(45,52,53,50)(2,5)(6,8)(25,28,29,41)(26,32,33,39)(27,35,37,54)(30,44,43,42)(31,45,47,53)(34,52,51,50)(36,40,38,55)(46,49,48,56)(9,12,13,21)(10,15,16,20)(11,18,19,24)(14,22,17,23)(28,41)(32,39)(35,54)(40,55)(42,44)(45,53)(49,56)(50,52)(1,3,4,7)(2,6,5,8)(11,19)(14,17)(18,24)(22,23)(27,36)(30,43)(31,46)(34,51)(35,40)(37,38)(42,44)(45,49)(47,48)(50,52)(53,56)(54,55)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.