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