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