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