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