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)(11,13)(12,14)(15,16)(17,18,23,26)(19,24,29,32)(20,21,25,22)(27,28,31,30)(2,6)(7,8)(9,11)(10,13)(12,15)(14,16)(17,19)(18,24)(20,27)(21,28)(22,30)(23,29)(25,31)(26,32) involution — undirected(1,3,5,4)(2,7,6,8)(11,15)(13,16)(17,20,22,18,23,25,21,26)(19,27,30,24,29,31,28,32)(11,15)(13,16)(17,21,23,22)(18,25,26,20)(19,28,29,30)(24,31,32,27)(1,4,5,3)(2,8,6,7)(10,14)(13,16)(19,29)(24,32)(27,31)(28,30)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.