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