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