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