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