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