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)(25,26,31,32)(27,35,36,33)(28,38,37,34)(29,30,39,40)(2,3)(4,8)(9,11)(10,15)(12,18)(13,23)(14,17)(16,24)(19,20)(21,22)(26,32)(27,36)(29,39)(34,38) involution — undirected(1,2,5,3)(4,6,8,7)(11,17)(15,24)(18,21)(19,23)(25,27,31,36)(26,33,32,35)(28,29,37,39)(30,38,40,34)(2,3)(6,7)(9,11)(10,15)(12,21)(13,19)(14,17)(16,24)(18,22)(20,23)(25,28,31,37)(26,34,32,38)(27,29,36,39)(30,35,40,33)(1,3,5,2)(4,7,8,6)(9,12)(10,13)(11,18)(14,22)(15,23)(16,20)(17,21)(19,24)(25,29)(26,30)(27,37)(28,36)(31,39)(32,40)(33,38)(34,35)(1,4)(2,6)(3,7)(5,8)(9,13)(10,12)(11,19)(14,20)(15,21)(16,22)(17,23)(18,24)(25,30)(26,29)(27,38)(28,35)(31,40)(32,39)(33,37)(34,36) 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.