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