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