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