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