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