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