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