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