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