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