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