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)(11,13)(12,14)(15,16)(17,18)(19,29)(20,31)(21,28)(22,26)(23,27)(24,25)(30,32) involution — undirected(2,5)(3,8)(9,11)(10,13)(12,15)(14,16)(17,19)(18,24)(20,27)(21,31)(22,25)(23,30)(26,29)(28,32) involution — undirected(11,15)(13,16)(17,20,23,24,22,32,21,29)(18,25,28,31,26,19,27,30)(1,3,4,8)(2,6,5,7)(11,15)(13,16)(18,26)(19,25)(27,28)(30,31)(2,5)(6,7)(10,14)(13,16)(17,21,22,23)(18,27,26,28)(19,30,25,31)(20,24,32,29)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.