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