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)(33,34,39,44)(35,45,49,64)(36,42,51,60)(37,41,50,61)(38,54,53,43)(40,56,59,47)(46,58,52,63)(48,57,55,62)(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)(33,35,39,49)(34,40,44,59)(36,47,51,56)(37,52,50,46)(38,55,53,48)(41,45,61,64)(42,62,60,57)(43,63,54,58)(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)(3,15)(8,23)(13,24)(14,29)(16,17)(22,28)(27,32)(30,31)(33,36,38,50,39,51,53,37)(34,41,43,60,44,61,54,42)(35,46,48,47,49,52,55,56)(40,57,58,45,59,62,63,64)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.