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