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