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