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