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