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