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