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