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