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