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