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