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