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