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