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