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