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