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