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