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)(27,36)(28,40)(29,34)(30,46)(31,35)(32,38)(33,43)(37,50)(39,48)(41,47)(42,51)(44,55)(45,49)(52,53)(54,56)(2,5)(6,8)(9,11,13,17)(10,14,15,21)(12,18,19,23)(16,20,22,24)(25,27,30,38,31,39,29,45)(26,32,34,36,35,49,46,48)(28,41,43,56,44,37,42,53)(33,50,40,54,51,47,55,52)(1,3,4,7)(2,6,5,8)(10,15)(11,17)(16,22)(18,23)(25,28,29,42,31,44,30,43)(26,33,46,55,35,51,34,40)(27,37,45,56,39,41,38,53)(32,47,48,54,49,50,36,52)(9,12)(10,16)(11,18)(13,19)(14,20)(15,22)(17,23)(21,24)(25,29,31,30)(26,34,35,46)(27,38,39,45)(28,42,44,43)(32,48,49,36)(33,40,51,55)(37,53,41,56)(47,54,50,52)(12,19)(16,22)(18,23)(20,24)(27,39)(32,49)(36,48)(37,41)(38,45)(47,50)(52,54)(53,56) involution — undirectedA 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.