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