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