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