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