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