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