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