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