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