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