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