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