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