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