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