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