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