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