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