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