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