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