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