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