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