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