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)(11,15)(12,16)(13,14) involution — undirected(1,3,4,8)(2,5,6,7)(17,18)(19,26)(20,22)(21,25)(23,27)(24,29)(28,32)(30,31)(10,14)(15,16)(18,22)(20,29)(23,26)(24,25)(27,30)(31,32) involution — undirected(2,6)(5,7)(9,11,13,12)(10,15,14,16)(3,8)(5,7)(9,12,13,11)(10,16,14,15)(17,19,21,28)(18,23,25,31)(20,30,29,27)(22,26,24,32)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.