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