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