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