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