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