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