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