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