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