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