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