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