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