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