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