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