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