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