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