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