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