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