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