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