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