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