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