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