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)(33,34,38,42,39,44,37,43)(35,45,47,40,49,56,48,57)(36,50,52,60,53,59,54,41)(46,58,63,64,51,55,62,61)(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)(34,40,43,45,44,57,42,56)(36,51,52,62,53,46,54,63)(41,58,50,64,60,55,59,61)(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)(33,36,37,52,39,53,38,54)(34,41,42,59,44,60,43,50)(35,46,47,62,49,51,48,63)(40,55,45,61,57,58,56,64)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.