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)(19,25)(20,28)(21,23)(22,31)(24,27)(26,30)(29,32) involution — undirected(2,6)(4,7)(9,10)(11,15)(12,14)(13,16)(18,23)(24,32)(25,28)(26,31) involution — undirected(1,3,5,8)(2,7,6,4)(9,11)(10,13)(12,16)(14,15)(17,19)(18,24)(20,21)(22,29)(23,32)(25,31)(26,28)(27,30)(2,6)(3,8)(11,16)(13,15)(17,20,21,19)(18,25,23,28)(22,29,30,27)(24,26,32,31)(1,4,5,7)(2,8,6,3)(10,14)(13,15)(19,20)(24,32)(25,28)(27,29)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.