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