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