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