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)(11,16)(12,21)(13,15)(14,18)(17,22)(19,20)(23,24)(27,33)(30,37)(34,39)(38,40)(1,3,5,8)(2,6,4,7)(9,11,15,19)(10,16,13,20)(12,14,22,24)(17,23,21,18)(25,26)(27,30)(28,35)(29,32)(31,36)(33,37)(34,40)(38,39)(1,4,5,2)(3,7,8,6)(10,13)(11,19)(12,22)(18,23)(25,26,29,32)(27,30,33,37)(28,31,36,35)(34,38,39,40)(9,12)(10,17)(11,14)(13,21)(15,22)(16,23)(18,20)(19,24)(25,27)(26,30)(28,34)(29,33)(31,38)(32,37)(35,40)(36,39) involution — undirected(9,13,15,10)(11,20,19,16)(12,21,22,17)(14,18,24,23)(25,26)(27,30)(28,35)(29,32)(31,36)(33,37)(34,40)(38,39)(9,14)(10,18)(11,12)(13,23)(15,24)(16,21)(17,20)(19,22)(25,28)(26,31)(27,34)(29,36)(30,38)(32,35)(33,39)(37,40) 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.