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