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