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