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