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