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