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