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