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