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