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