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