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