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