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