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