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