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