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