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