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