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