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