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