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