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