One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,4)(3,7,8,6)(9,10,13,14)(11,12,16,15)(17,18)(19,23)(20,21)(22,24)(25,26,29,28)(27,30,31,32)(2,4)(6,7)(9,10)(11,15)(12,16)(13,14)(18,20)(19,24)(27,31)(30,32) involution — undirected(3,8)(6,7)(10,14)(11,16)(17,19,21,24)(18,22,20,23)(25,27)(26,30)(28,32)(29,31)(1,3)(2,6)(4,7)(5,8)(9,11)(10,12)(13,16)(14,15)(17,19)(18,22)(20,23)(21,24)(25,28,29,26)(27,32,31,30)(1,4,5,2)(3,7,8,6)(9,12)(10,11)(13,15)(14,16)(17,20,21,18)(19,23,24,22)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.