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