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