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