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