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