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