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