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