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