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