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