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