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