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