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