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