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