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