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