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