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