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