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