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