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)(18,23)(19,26)(25,31)(29,30)(2,5)(6,8)(9,10)(11,14)(12,13)(15,16)(17,18,21,23)(19,27,26,32)(20,25,22,31)(24,29,28,30)(1,3,4,7)(2,6,5,8)(10,13)(14,16)(17,18)(19,28)(20,31)(21,23)(22,25)(24,26)(27,29)(30,32)(10,13)(14,16)(17,19)(18,24)(20,30)(21,26)(22,29)(23,28)(25,32)(27,31) involution — undirected(2,5)(6,8)(9,11,12,15)(10,14,13,16)(17,20,21,22)(18,25,23,31)(19,29,26,30)(24,27,28,32)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.