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