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