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