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