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