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