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