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