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