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