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