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