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