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