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