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