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