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