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