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