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