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