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