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