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