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