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