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