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