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