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