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