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