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