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