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