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