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