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