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