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