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)(13,25)(14,22)(16,26)(17,23)(18,24)(19,30)(21,29)(27,31)(28,32)(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)(2,8,10,12,11,22,20,26)(4,13,19,29,18,28,17,27)(9,21,23,25,24,31,30,32)(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)(5,17)(6,19)(7,18)(8,21)(10,23)(11,24)(12,25)(14,27)(15,29)(16,28)(20,30)(22,31)(26,32)(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)(8,12,22,26)(9,23,24,30)(13,27,28,29)(21,25,31,32)(36,46)(40,52)(43,55)(47,58)(49,59)(53,62)(56,63)(60,64)(4,18)(9,24)(13,28)(17,19)(21,31)(23,30)(25,32)(27,29)(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.