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