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