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