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