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