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