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