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)(18,23)(19,26)(20,30)(21,24)(28,29)(31,32) involution — undirected(1,3,5,11)(2,6,9,16)(4,12,13,10)(7,15,8,14)(17,18,24,30,22,20,21,23)(19,27,26,31,29,25,28,32)(2,7)(4,13)(6,14)(8,9)(10,12)(15,16)(17,19)(18,25)(20,27)(21,28)(22,29)(23,31)(24,26)(30,32) involution — undirected(17,20,21,30,22,18,24,23)(19,25,28,31,29,27,26,32)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.