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