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