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