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