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