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