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