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