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