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