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