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