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