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