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