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