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