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