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