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