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