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