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