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