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