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