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