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