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