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