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