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