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