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