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