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