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