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