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