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