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