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