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