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