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