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