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