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