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