One vertex per element, one color per generator, with an edge from x to x·s.
(9,10)(11,19)(12,21)(13,17)(14,20)(15,16)(18,22)(23,24)(25,26,30,33)(27,28,35,31)(29,32,37,39)(34,36,40,38)(1,2)(3,6)(4,5)(7,8)(10,16)(12,22)(17,19)(20,23)(25,27,30,35)(26,31,33,28)(29,34,37,40)(32,38,39,36)(2,5)(6,8)(9,11,15,13)(10,17,16,19)(12,20,22,23)(14,21,24,18)(25,27)(26,28)(29,34)(30,35)(31,33)(32,36)(37,40)(38,39)(3,7)(6,8)(9,12)(10,18)(11,20)(13,23)(14,17)(15,22)(16,21)(19,24)(25,28)(26,27)(29,36)(30,31)(32,34)(33,35)(37,38)(39,40) involution — undirected(1,3,4,7)(2,6,5,8)(9,13,15,11)(10,19,16,17)(12,20,22,23)(14,21,24,18)(25,29,30,37)(26,32,33,39)(27,34,35,40)(28,36,31,38)(1,2)(3,6)(4,5)(7,8)(9,14)(10,20)(11,18)(12,17)(13,21)(15,24)(16,23)(19,22) 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.