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