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)(19,27)(20,25)(21,24)(22,26)(23,28)(29,31)(30,32) involution — undirected(1,3,5,4)(2,6,8,7)(9,11)(10,13)(12,15)(14,16)(17,19,21,28)(18,23,24,27)(20,22,29,30)(25,32,31,26)(1,3,5,4)(2,7,8,6)(10,14)(11,15)(18,24)(19,28)(20,29)(26,32)(10,14)(13,16)(17,20,22,28,21,29,30,19)(18,25,26,23,24,31,32,27)(1,4,5,3)(2,7,8,6)(18,24)(23,27)(25,31)(26,32)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.