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