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