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