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