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