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