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