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