One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,11,7,12,30,42,5,14,26,43,8,13,31,28)(3,9,18,34,32,15,44,46,17,36,27,41,19,35,51,63)(4,20,23,10,24,37,59,38,22,55,58,40,25,54,29,39)(16,47,48,33,52,61,60,56,21,53,57,62,49,64,50,45)(1,3)(2,9)(4,21)(5,17)(6,27)(7,32)(8,19)(10,33)(11,41)(12,15)(13,35)(14,36)(16,22)(18,26)(20,53)(23,48)(24,49)(25,52)(28,46)(29,50)(30,51)(31,44)(34,43)(37,64)(38,56)(39,45)(40,62)(42,63)(47,55)(54,61)(57,58)(59,60) involution — undirected(1,2)(3,15)(4,10)(5,14)(6,28)(7,13)(8,12)(9,32)(11,31)(16,45)(17,35)(18,34)(19,36)(20,23)(21,56)(22,40)(24,39)(25,38)(26,42)(27,41)(29,37)(30,43)(33,49)(44,63)(46,51)(47,50)(48,64)(52,62)(53,60)(54,59)(55,58)(57,61) involution — undirected(1,4,5,22)(2,10,14,40)(3,16,17,21)(6,29,26,59)(7,25,8,24)(9,33,36,62)(11,20,43,55)(12,39,13,38)(15,45,35,56)(18,50,27,60)(19,52,32,49)(23,30,58,31)(28,37,42,54)(34,47,41,53)(44,57,51,48)(46,64,63,61)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.