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