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