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