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