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