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