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