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