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