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