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