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