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