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