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