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