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