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