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