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