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