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