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