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