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