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