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