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