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